CVE-2015-2311

Publication date 9 August 2017

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

Integer underflow in Sandstorm Cap'n Proto before 0.4.1.1 and 0.5.x before 0.5.1.1 might allow remote peers to cause a denial of service or possibly obtain sensitive information from memory or execute arbitrary code via a crafted message.

From the Ubuntu Security Team

Kenton Varda discovered that the Cap'n Proto utility has a buffer overflow vulnerability. An attacker could use this vulnerability to cause a crash or possibly execute arbitrary code.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
capnproto	18.04 LTS bionic	Not affected
	17.10 artful	Not affected
	17.04 zesty	Not affected
	16.10 yakkety	Not affected
	16.04 LTS xenial	Not affected
	15.10 wily	Ignored end of life
	14.04 LTS trusty	Fixed 0.4.0-1ubuntu2.1
	12.04 LTS precise	Not in release
	10.04 LTS lucid	Not in release

Notes

tyhicks

Fixed in 0.4.1.1, 0.5.1.1, and 0.6

Severity score breakdown

Parameter	Value
Base score	9.8 · Critical
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H